Overview
The “Wattmetric zero sequence directional” element responds to power derived from zero-sequence voltage and current in a direction specified by the element characteristic angle. The angle can be set within all four quadrants, and the power can be active or reactive. Therefore, the element can be used to sense either forward or reverse ground faults in either inductive, capacitive, or resistive networks. The inverse time characteristic allows time coordination of elements across the network.
For more detailed information on “Wattmetric zero sequence directional” element, refer to GE, Universal Relay (UR) family of products, Version 8.0x manuals.
To see other supported elements, click here.
Setting Parameters
Modbus memory map for Setting parameters
| Products | Hex address | Register name | Range | Units | Step | Format | Default |
| D30, D60, F35, F60, L60, L90 | 7630 | Wattmetric Ground Fault 1 Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 7631 | Wattmetric Ground Fault 1 Source | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | 7632 | Wattmetric Ground Fault 1 Voltage | 0 to 1 | — | 1 | F234 | 0 (Calculated VN) |
| " | 7633 | Wattmetric Ground Fault 1 Overvoltage Pickup | 0.02 to 3 | pu | 0.01 | F001 | 20 |
| " | 7634 | Wattmetric Ground Fault 1 Current | 0 to 1 | — | 1 | F235 | 0 (Calculated IN) |
| " | 7635 | Wattmetric Ground Fault 1 Overcurrent Pickup | 0.002 to 30 | pu | 0.001 | F001 | 60 |
| " | 7636 | Wattmetric Ground Fault 1 Overcurrent Pickup Delay | 0 to 600 | s | 0.01 | F001 | 20 |
| " | 7637 | Wattmetric Ground Fault 1 Power Pickup | 0.001 to 1.2 | pu | 0.001 | F001 | 100 |
| " | 7638 | Wattmetric Ground Fault 1 ECA | 0 to 360 | ° Lag | 1 | F001 | 0 |
| " | 7639 | Wattmetric Ground Fault 1 Power Pickup Delay | 0 to 600 | s | 0.01 | F001 | 20 |
| " | 763A | Wattmetric Ground Fault 1 Curve | 0 to 5 | — | 1 | F236 | 0 (Definite Time) |
| " | 763B | Wattmetric Ground Fault 1 Multiplier | 0.01 to 2 | s | 0.01 | F001 | 100 |
| " | 763C | Wattmetric Ground Fault 1 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 763E | Wattmetric Ground Fault 1 Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 763F | Wattmetric Ground Fault 1 Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 7640 | Wattmetric Ground Fault 1 Reference Power | 0.001 to 1.2 | pu | 0.001 | F001 | 500 |
| " | 7641 | Reserved | 0 to 1 | — | 1 | F001 | 0 |
| " | 7642 | …Repeated for Wattmetric Ground Fault 2 | |||||
| F35 | 7654 | …Repeated for Wattmetric Ground Fault 3 | |||||
| " | 7666 | …Repeated for Wattmetric Ground Fault 4 | |||||
| " | 7678 | …Repeated for Wattmetric Ground Fault 5 |
| F102 | 0 = Disabled, 1 = Enabled | ||||||
| F109 | 0 = Self-reset, 1 = Latched, 2 = Disabled | ||||||
| F167 | 0 = SRC 1, 1 = SRC 2, 2 = SRC 3, 3 = SRC 4, 4 = SRC 5, 5 = SRC 6 | ||||||
| F234 | 0 = Calculated VN, 1 = Measured VX | ||||||
| F235 | 0 = Calculated IN, 1 = Measured IG | ||||||
| F236 | 0 = Definite Time, 1 = Inverse, 2 = FlexCurve A, 3 = FlexCurve B, 4 = FlexCurve C, 5 = FlexCurve D | ||||||
Logics & highlights
Definitions
Wattmetric characteristic angle response
